﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using System.Collections.Generic;
using System.Windows.Controls;
using System.Windows;

namespace Xceed.Silverlight.DragDrop
{
  class DragDropCanvas : Canvas
  {
#if !SILVERLIGHT
    protected override Size MeasureOverride( Size availableSize )
    {
      Size canvasDesiredSize = new Size();

      foreach( UIElement child in this.Children )
      {
        child.Measure( new Size( double.PositiveInfinity, double.PositiveInfinity ) );

        Rect childRect = new Rect( new Point( Canvas.GetLeft( child ), Canvas.GetTop( child ) ), child.DesiredSize );

        Rect transformBounds = child.RenderTransform.TransformBounds( childRect );

        canvasDesiredSize.Width = Math.Max( canvasDesiredSize.Width, transformBounds.Right );
        canvasDesiredSize.Height = Math.Max( canvasDesiredSize.Height, transformBounds.Bottom );
      }

      return canvasDesiredSize;
    }
#endif
  }
}
